"I haven't formed a view yet - there's heaps of information to review.

"But I think it's possible. We wouldn't be going down this path if we didn't think it was possible."

The former-Air New Zealand chief executive is advising the Government's action following the November 2010 disaster which saw 29 men lose their lives.

In January a Pike River Recovery Agency launched, headed by former Army Chief Major General Dave Gawn, tasked with devising a safe plan to get back into both the mine's access tunnel and main workings in stages.